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// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/arch/arm/mach-w90x900/mfp.c
*
* Copyright (c) 2008 Nuvoton technology corporation
*
* Wan ZongShun <mcuos.com@gmail.com>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/string.h>
#include <linux/clk.h>
#include <linux/mutex.h>
#include <linux/io.h>
#include <mach/hardware.h>
#define REG_MFSEL (W90X900_VA_GCR + 0xC)
#define GPSELF (0x01 << 1)
#define GPSELC (0x03 << 2)
#define GPSELD (0x0f << 4)
#define GPSELEI0 (0x01 << 26)
#define GPSELEI1 (0x01 << 27)
#define GPIOG0TO1 (0x03 << 14)
#define GPIOG2TO3 (0x03 << 16)
#define GPIOG22TO23 (0x03 << 22)
#define GPIOG18TO20 (0x07 << 18)
#define ENSPI (0x0a << 14)
#define ENI2C0 (0x01 << 14)
#define ENI2C1 (0x01 << 16)
#define ENAC97 (0x02 << 22)
#define ENSD1 (0x02 << 18)
#define ENSD0 (0x0a << 4)
#define ENKPI (0x02 << 2)
#define ENNAND (0x01 << 2)
static DEFINE_MUTEX(mfp_mutex);
void mfp_set_groupf(struct device *dev)
{
unsigned long mfpen;
const char *dev_id;
BUG_ON(!dev);
mutex_lock(&mfp_mutex);
dev_id = dev_name(dev);
mfpen = __raw_readl(REG_MFSEL);
if (strcmp(dev_id, "nuc900-emc") == 0)
mfpen |= GPSELF;/*enable mac*/
else
mfpen &= ~GPSELF;/*GPIOF[9:0]*/
__raw_writel(mfpen, REG_MFSEL);
mutex_unlock(&mfp_mutex);
}
EXPORT_SYMBOL(mfp_set_groupf);
void mfp_set_groupc(struct device *dev)
{
unsigned long mfpen;
const char *dev_id;
BUG_ON(!dev);
mutex_lock(&mfp_mutex);
dev_id = dev_name(dev);
mfpen = __raw_readl(REG_MFSEL);
if (strcmp(dev_id, "nuc900-lcd") == 0)
mfpen |= GPSELC;/*enable lcd*/
else if (strcmp(dev_id, "nuc900-kpi") == 0) {
mfpen &= (~GPSELC);/*enable kpi*/
mfpen |= ENKPI;
} else if (strcmp(dev_id, "nuc900-nand") == 0) {
mfpen &= (~GPSELC);/*enable nand*/
mfpen |= ENNAND;
} else
mfpen &= (~GPSELC);/*GPIOC[14:0]*/
__raw_writel(mfpen, REG_MFSEL);
mutex_unlock(&mfp_mutex);
}
EXPORT_SYMBOL(mfp_set_groupc);
void mfp_set_groupi(struct device *dev)
{
unsigned long mfpen;
const char *dev_id;
BUG_ON(!dev);
mutex_lock(&mfp_mutex);
dev_id = dev_name(dev);
mfpen = __raw_readl(REG_MFSEL);
mfpen &= ~GPSELEI1;/*default gpio16*/
if (strcmp(dev_id, "nuc900-wdog") == 0)
mfpen |= GPSELEI1;/*enable wdog*/
else if (strcmp(dev_id, "nuc900-atapi") == 0)
mfpen |= GPSELEI0;/*enable atapi*/
else if (strcmp(dev_id, "nuc900-keypad") == 0)
mfpen &= ~GPSELEI0;/*enable keypad*/
__raw_writel(mfpen, REG_MFSEL);
mutex_unlock(&mfp_mutex);
}
EXPORT_SYMBOL(mfp_set_groupi);
void mfp_set_groupg(struct device *dev, const char *subname)
{
unsigned long mfpen;
const char *dev_id;
BUG_ON((!dev) && (!subname));
mutex_lock(&mfp_mutex);
if (subname != NULL)
dev_id = subname;
else
dev_id = dev_name(dev);
mfpen = __raw_readl(REG_MFSEL);
if (strcmp(dev_id, "nuc900-spi") == 0) {
mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);
mfpen |= ENSPI;/*enable spi*/
} else if (strcmp(dev_id, "nuc900-i2c0") == 0) {
mfpen &= ~(GPIOG0TO1);
mfpen |= ENI2C0;/*enable i2c0*/
} else if (strcmp(dev_id, "nuc900-i2c1") == 0) {
mfpen &= ~(GPIOG2TO3);
mfpen |= ENI2C1;/*enable i2c1*/
} else if (strcmp(dev_id, "nuc900-ac97") == 0) {
mfpen &= ~(GPIOG22TO23);
mfpen |= ENAC97;/*enable AC97*/
} else if (strcmp(dev_id, "nuc900-mmc-port1") == 0) {
mfpen &= ~(GPIOG18TO20);
mfpen |= (ENSD1 | 0x01);/*enable sd1*/
} else {
mfpen &= ~(GPIOG0TO1 | GPIOG2TO3);/*GPIOG[3:0]*/
}
__raw_writel(mfpen, REG_MFSEL);
mutex_unlock(&mfp_mutex);
}
EXPORT_SYMBOL(mfp_set_groupg);
void mfp_set_groupd(struct device *dev, const char *subname)
{
unsigned long mfpen;
const char *dev_id;
BUG_ON((!dev) && (!subname));
mutex_lock(&mfp_mutex);
if (subname != NULL)
dev_id = subname;
else
dev_id = dev_name(dev);
mfpen = __raw_readl(REG_MFSEL);
if (strcmp(dev_id, "nuc900-mmc-port0") == 0) {
mfpen &= ~GPSELD;/*enable sd0*/
mfpen |= ENSD0;
} else
mfpen &= (~GPSELD);
__raw_writel(mfpen, REG_MFSEL);
mutex_unlock(&mfp_mutex);
}
EXPORT_SYMBOL(mfp_set_groupd);
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